The past 2 - 3 months i've been breifly looking at flash game code on neopets and i've found a way of minimizing a risk of being frozen using a flash trainer. Just follow these steps keeping in mind if the game has an inbuilt timing system in it, I don't reccomend trainres with this functions as the times you complete the games in are sent and if the game has a maximum of 12 minutes play time and you have played it for 13 using cheats you will be frozen.
1. Run the trainer
2. If the game has a time limit then I can only give you one piece of advice and thats NOT to use trainers with an unlimited time function as they are the trainers that maximize your chances of being frozen if the game doesn't have a time limit just Load the game and wait to emulate a longer game play time.
3. When satisfied with the time you've waited play the game with cheats enabled & send score